package com.example.demo.day.config.learn.design.single.tamplate;

//懒汉式(线程安全)
public class Singleton2 {

    private static Singleton2 instance;

    private Singleton2() {}

    public static synchronized Singleton2 getInstance() {
        if (instance == null) {
            instance = new Singleton2();
        }
        return instance;
    }
}
